Kilic Beyza, Dogan Vakkas, Kilic Volkan, Kahyaoglu Leyla Nesrin
Department of Food Engineering, Middle East Technical University, 06800 Ankara, Turkey.
Department of Electrical and Electronics Engineering, Izmir Katip Celebi University, 35620 Izmir, Turkey.
Int J Biol Macromol. 2022 Jun 1;209(Pt A):1562-1572. doi: 10.1016/j.ijbiomac.2022.04.119. Epub 2022 Apr 22.
The objective of this study was to develop novel colorimetric films for food freshness monitoring. UV light irradiation (365 nm) and carbon dots (CDs) were tested as the potential crosslinkers in the fabrication of anthocyanins doped fish gelatin (FG) films. The effect of crosslinkers on the optical, surface, structural, barrier and mechanical properties of FG films was investigated. The incorporation of CDs under UV irradiation improved the tested properties of FG films. The kinetic colorimetric responses of FG films against ammonia vapor were studied to simulate the food spoilage and determine the ammonia sensitivity of the films. Among the tested films, UV-treated FG films containing 100 mg/l (FG-UV-CD100) indicated the best properties. Later, the color difference of FG-UV-CD100 films was observed to correlate well with microbial growth and TVB-N release in skinless chicken breast samples. At the same time, a custom-designed smartphone application (SmartFood) was developed to be used with the FG-UV-CD100 film for quantitative estimation of food freshness in real-time. The proposed food freshness monitoring platform reveals a great potential to minimize global food waste and the outbreak of foodborne illness.
本研究的目的是开发用于食品新鲜度监测的新型比色膜。在制备花青素掺杂鱼明胶（FG）膜时，测试了紫外线照射（365nm）和碳点（CDs）作为潜在的交联剂。研究了交联剂对FG膜的光学、表面、结构、阻隔和机械性能的影响。在紫外线照射下加入CDs改善了FG膜的测试性能。研究了FG膜对氨蒸气的动力学比色响应，以模拟食品变质并确定膜对氨的敏感性。在测试的薄膜中，含有100mg/l的紫外线处理FG膜（FG-UV-CD100）表现出最佳性能。后来，观察到FG-UV-CD100膜的色差与无皮鸡胸肉样品中的微生物生长和TVB-N释放有很好的相关性。同时，开发了一款定制的智能手机应用程序（SmartFood），与FG-UV-CD100膜一起用于实时定量估计食品新鲜度。所提出的食品新鲜度监测平台在最大限度减少全球食物浪费和食源性疾病爆发方面显示出巨大潜力。
